Paper Color

Is it possible to set up a rule that will act on scans of yellow paper only?
I write a lot of handwritten notes on legal pads and would like to be able to set up rules for these scans. My handwriting is not going to be legible via OCR so I am not sure how to do this.
I write a lot of handwritten notes on legal pads and would like to be able to set up rules for these scans. My handwriting is not going to be legible via OCR so I am not sure how to do this.